{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0914301a04decdf08c330eaa69c23d7e4be6e4ef0808455be3d754e481399aca",
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    "signer": "0xB0cb48228EB96F7bE966f202a0be4D62B595c719",
    "userId": "415331669"
  }
}